Matthew James Day, M.D.
Nephrology Physician · Savannah, GA
Matthew James Day, M.D. is a nephrology physician with a practice address in Savannah, Georgia, and NPI 1619237328, issued on May 29, 2012. Check the license (Georgia 84151, as entered in NPPES) on the Georgia Composite Medical Board; the Medicare figures below come from public CMS files.
- Name
- Matthew James Day
- Credential
- M.D.
- Primary taxonomy
- Nephrology Physician 207RN0300X
- License number
- 84151 GA
Self-reported in NPPES; status is on the state search - Practice location
- 500 E 66TH St, Savannah, GA 31405
- Phone
- (912) 356-5643
- Enumerated
- May 29, 2012
- Record last updated
- Feb 26, 2020 (not updated in 6 years: call before relying on the address or phone)
- Fax
- (912) 354-4430
- Medicare enrollment
- Enrolled (PECOS I20191118001448); accepts Medicare assignment
- Medical or professional school
- Medical College Of Georgia School Of Medicine, 2012
- Entity
- Type 1 · individual
8 nearest nephrology physician records → All 417 in Georgia → Look up another NPI →
Also registered at 500 E 66TH St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Craig Saxton, M. D.Nephrology Physician1487654687
Verify Matthew James Day in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersGeorgia Composite Medical Board
Search for license 84151Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
11% fewer Medicare Part D claims than the average nephrology physician in 2024
1,310 Medicare Part D claims for 220 beneficiaries, against an average of 1,465 among the 10,986 providers of this specialty who prescribed in Part D. Brand-name drugs were 8% of claims.
Most prescribed
- Amlodipine Besylate123 claims
- Calcitriol110 claims
- Hydralazine Hcl108 claims
- Furosemide86 claims
- Carvedilol72 claims
- Calcium Acetate58 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
The practice group's MIPS final score for 2023 (Medicare payment program): 85.4 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $367.00
17 payments; by number, the most common kind was food and beverage; the largest payer was Vifor Pharma, Inc. The 8,230 providers of this specialty with any payment received $3,091.37 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Kidney Specialists OF Savannah PCSavannah, GA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Matthew James Day among 417 nephrology physician records in Georgia
Matthew James Day, M.D. is one of 417 nephrology physician records with a practice address in Georgia. 91% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2012, is newer than 80% of them.
- NPI issued2012 · 80% of these records are older, 16% newer
- In a Medicare fileYes · 91% of these records are
- In the CMS Doctors and Clinicians fileYes · 82% of these records are
- Graduated2012 · median 2001 among the 343 with a school on file
- Record last updated2020 · 64% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RN0300X and a Georgia practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Nephrology Physician providers in Georgia
There are 417 nephrology physician records in Georgia.
All 417 in Georgia → Every provider in Savannah → Nephrology Physician nationwide →
The 8 nephrology physician records with the nearest ZIP codes
- Craig Saxton, M. D.Savannah, GA 314051487654687
- James Bazemore, M.D.Savannah, GA 314041265435564
- Erik Bernstein, MDSavannah, GA 314041174562235
- Dana Kumjian, MDSavannah, GA 314041396704326
- Joseph Lapinsky, D.O.Savannah, GA 314061306371430
- Rebecca Sentman, MDSavannah, GA 314041669431672
- Garrett White, M.D.Savannah, GA 314061225031842
- William Gabbard, MDSavannah, GA 314191407894710
Common questions
What is Matthew James Day, M.D.'s NPI number?
Matthew James Day, M.D.'s National Provider Identifier (NPI) is 1619237328, issued on May 29, 2012. An NPI identifies a provider in billing; it is not a license.
Where is Matthew James Day, M.D. located?
The NPPES record lists a practice address at 500 E 66TH St, Savannah, GA, 31405. Phone: (912) 356-5643. Providers update this record themselves, so call before visiting.
How can I verify Matthew James Day, M.D.'s license?
NPPES lists Georgia license number 84151, as entered by the provider. Search the Georgia Composite Medical Board at https://medicalboard.georgia.gov/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Matthew James Day, M.D. prescribe under Medicare Part D?
In 2024, Matthew James Day, M.D. had 1,310 Medicare Part D claims for 220 beneficiaries; the average among nephrology physician prescribers was 1,465. Part D covers Medicare prescriptions only.
What is Matthew James Day, M.D.'s MIPS final score?
The 2023 MIPS final score is 85.4 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.